I say ditch the terrains and interiors. We really aren't losing anything special. Hell we could easily replace them with some big ass .blbs, and even get less lag that way.
My one and only concern is collision issues. I hope those are being fixed next over anything.
As to Mr. Wallet: I am a gameplay > graphics guy myself, but dealing with terrain and interiors all the time is irritating. They don't even look like they belong in the game at all. It's like throwing some GTA:SA models into Blockland without any flatshading or simplification.
I will play a fun game, even if it has mashed up themes, but Blockland isn't going to become 'less fun' with interiors and terrain gone.
what's the "core mechanic"? sitting around building cities? terrain isn't only for TDMs. minecraft sucks because it's limited to boring survival. blockland is 100x better because you can do what you want. the "core mechanic" is building, but the heart of the majority doesn't match that (see: the server list). sorry, the dreams of people to turn blocklanders into builders and not fighters doesn't actually match what most people want to do.
No one is stopping anyone from deathmatching or even remotely forcing everyone to build.
A couple of people can still build something and have other players jump in and play some minigames.
Sure, someone has to build, but not everyone. Actually, scratch that. If NO ONE EVER wanted to build EVER again in Blockland, there's still default/gallery saves to load. People can still be fighters instead of builders (and no one ever said you had to only pick one, you can do both).
Oh yeah and don't expect to see any DRPG servers anymore.